Cracked windscreen.

Attributes
ACN	285132
Time
Date	199410
Day	Mon
Local Time Of Day	1201 To 1800
Place
Locale Reference	airport : pbi
State Reference	FL
Altitude	msl bound lower : 40000 msl bound upper : 40000
Environment
Flight Conditions	VMC
Light	Daylight
Aircraft 1
Controlling Facilities	artcc : zma
Operator	general aviation : corporate
Make Model Name	Any Unknown or Unlisted Aircraft Manufacturer
Operating Under FAR Part	Part 91
Flight Phase	climbout : intermediate altitude
Flight Plan	IFR
Person 1
Affiliation	Other
Function	flight crew : captain oversight : pic
Qualification	pilot : atp pilot : flight engineer
Experience	flight time last 90 days : 100 flight time total : 7800 flight time type : 1700
ASRS Report	285132
Person 2
Affiliation	Other
Function	flight crew : first officer
Qualification	pilot : commercial pilot : instrument
Events
Anomaly	aircraft equipment problem : critical
Independent Detector	other flight crewa
Resolutory Action	flight crew : overcame equipment problem
Consequence	other
Supplementary
Primary Problem	Aircraft
Air Traffic Incident	other

Narrative:

Climbing to FL410 out of FL400, right front windshield suddenly cracked. Oxygen masks on, immediate descent requested (no structural compromise noted) and granted. Descended to FL190, performed appropriate checklist. Damage confined to outer layer of glass. Proceeding to destination (bwi) at reduced airspeed and psi differential appropriate. There was no evidence of damage to structural plies of windscreen. We did not feel it necessary to declare an emergency in this case. The windshield was replaced that night and no structural damage was reported.

Original NASA ASRS Text

Title: CRACKED WINDSCREEN.

Narrative: CLBING TO FL410 OUT OF FL400, R FRONT WINDSHIELD SUDDENLY CRACKED. OXYGEN MASKS ON, IMMEDIATE DSCNT REQUESTED (NO STRUCTURAL COMPROMISE NOTED) AND GRANTED. DSNDED TO FL190, PERFORMED APPROPRIATE CHKLIST. DAMAGE CONFINED TO OUTER LAYER OF GLASS. PROCEEDING TO DEST (BWI) AT REDUCED AIRSPD AND PSI DIFFERENTIAL APPROPRIATE. THERE WAS NO EVIDENCE OF DAMAGE TO STRUCTURAL PLIES OF WINDSCREEN. WE DID NOT FEEL IT NECESSARY TO DECLARE AN EMER IN THIS CASE. THE WINDSHIELD WAS REPLACED THAT NIGHT AND NO STRUCTURAL DAMAGE WAS RPTED.

Data retrieved from NASA's ASRS site as of July 2007 and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.